Damien Boilley from suburbs of Paris, France / CC BY 2.0, via Wikimedia Commons
Soursop: complete guide
Annona muricata
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Overview
The soursop (Annona muricata), also known as graviola, is a very popular tropical fruit tree with a long history of indigenous use in the Americas. The tree produces green, unevenly bumpy fruits that can reach 15-20 cm in length. The white flesh is sour-tasting and highly nutritious.
Appearance & Bloom
The soursop tree grows into a slender, symmetrical crown with dark green elliptical leaves. The tree reaches 5-9 meters in height under good conditions. Small yellowish-green flowers appear along branches and bear a pleasant but subtle fragrance. The characteristic bumpy fruits appear along branches and trunks.
Ideal Location
The soursop thrives in warm, humid tropical climate. The tree prefers full sun but tolerates partial shade. Ideal temperatures range between 24-28 degrees Celsius. The tree grows poorly at temperatures below 15 degrees Celsius. Protection from strong winds helps.
Soil
Use nutrient-rich, well-draining soil with pH 5.5-6.5. The soursop thrives well in sandy to loamy soils. Adding compost and organic matter improves structure and water-holding capacity. Avoid waterlogging and heavy clay soils.
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Watering
Give regular water during growing season. Soursop thrives in moist conditions but does not tolerate waterlogging. Keep soil evenly moist but not saturated. In dry seasons, supplemental irrigation may be needed.
Pruning
Minimal pruning is needed for healthy trees. Remove only dead, damaged or diseased branches. Promoting three to five primary branches gives better form. Light heading-pruning encourages bushiness.
Maintenance Calendar
May-June: Blooming August-October: Fruit setting and growth November-January: Main harvest February-April: Light blooming possible
Winter Hardiness
The soursop is only winter-hardy in USDA zones 10b-11. In temperate climates, the tree must be grown indoors. Minimum temperature must remain above 10 degrees Celsius.
Companion Plants
Plant with other Annonaceae members and tropical fruit trees. Avoid plantings with heavy shade-casting. Legume cover-crops improve soil quality.
Closing Remarks
The soursop is a valuable and popular choice for tropical gardens. With regular water, good drainage and warmth, this tree will give rich yields. Consult local nurseries for the best cultivars.
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